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TROUBLESHOOTING MULTIPOINT FUEL INJECTION (MPI) 13A-37 STEP 3. Check harness between manifold • Check power supply line for open/short circuit. Q: Is the check result normal? YES : Go to Step 4. NO : Repair or replace the connector, or repair STEP 4. M.U.T.-III data list • Data list reference table (Refer to ). a. Item 8: Manifold absolute pressure sensor Q: Is the check result normal? YES : Intermittent malfunction (Refer to GROUP 00 − How to Use Troubleshooting/Inspection Service Points − How to Cope with Intermittent Malfunctions NO : Replace the engine-ECU. STEP 5. Check harness between manifold • Check power supply line for damage. Q: Is the check result normal? YES : Go to Step 6. NO : Repair or replace the connector, or repair STEP 6. Perform voltage measurement at • Use special tool test harness (MB991709) to con- nect connector, and measure at pick-up harness. • Ignition switch: "ON" • Voltage between terminal engine-ECU MAP line and body earth. Altitude 0 m: 3.8 − 4.2 V Altitude 600 m: 3.5 − 3.9 V Altitude 1,200 m: 3.3 − 3.7 V Altitude 1,800 m: 3.0 − 3.4 V Q: Is the check result normal? YES : Go to Step 8. NO : Go to Step 7. STEP 7. Check harness between manifold • Check output line for short circuit. Q: Is the check result normal? YES : Replace the manifold absolute pressure sensor. NO : Repair the damaged harness wire. STEP 8. Perform voltage measurement at • Disconnect engine-ECU harness, and connect special tool power plant ECU check harness • Ignition switch: "ON" • Voltage between terminal MAP and body earth. Altitude 0 m: 3.8 − 4.2 V Altitude 600 m: 3.5 − 3.9 V Altitude 1,200 m: 3.3 − 3.7 V Altitude 1,800 m: 3.0 − 3.4 V Q: Is the check result normal? YES : Go to Step 4. NO : Repair or replace the connector, or check and repair harness between manifold • Check output line for open circuit and damage. Code No. P0108: Manifold Absolute Pressure Sensor Circuit High Input OPERATION • A power voltage of 5 V is applied to the manifold absolute pressure sensor power terminal from MAPE from the manifold absolute pressure sen- • The sensor signal is inputted to the engine-ECU connector terminal MAP from the manifold abso- |